Abstract
In order to understand the role of a plasma-sprayed tungsten (W) coating on tritium (T) permeation in a W-coated ferritic/martensitic steel (F82H), we have examined depth profiles of T in the coating and the substrate using the tritium imaging plate technique after T loading by a dc glow-discharged plasma at 453 and 573 K for 2 h. Tritium loaded by plasma exposure was distributed uniformly in the whole coating, while T penetrated to the substrate by diffusion. The former is caused by T diffusion through open pores and/or along grain boundaries followed by adsorption on grain surfaces and dissolution in the grains. The main role of the W coating on T permeation is to reduce the incoming flux at the coating/substrate interface owing to pore diffusion in the coating and the effective area for T dissolution in the substrate.
| Original language | English |
|---|---|
| Article number | 014035 |
| Journal | Physica Scripta T |
| Volume | T145 |
| DOIs | |
| Publication status | Published - Dec 1 2011 |
| Event | 13th International Workshop on Plasma-Facing Materials and Components for Fusion Applications, PFMC-13 and 1st International Conference on Fusion Energy Materials Science, FEMaS-1 - Rosenheim, Germany Duration: May 9 2011 → May 13 2011 |
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All Science Journal Classification (ASJC) codes
- Atomic and Molecular Physics, and Optics
- Mathematical Physics
- Condensed Matter Physics
Cite this
Behaviour of tritium in plasma-sprayed tungsten coating on steel exposed to tritium plasma. / Otsuka, T.; Tanabe, T.; Tokunaga, K.
In: Physica Scripta T, Vol. T145, 014035, 01.12.2011.Research output: Contribution to journal › Conference article
}
TY - JOUR
T1 - Behaviour of tritium in plasma-sprayed tungsten coating on steel exposed to tritium plasma
AU - Otsuka, T.
AU - Tanabe, T.
AU - Tokunaga, K.
PY - 2011/12/1
Y1 - 2011/12/1
N2 - In order to understand the role of a plasma-sprayed tungsten (W) coating on tritium (T) permeation in a W-coated ferritic/martensitic steel (F82H), we have examined depth profiles of T in the coating and the substrate using the tritium imaging plate technique after T loading by a dc glow-discharged plasma at 453 and 573 K for 2 h. Tritium loaded by plasma exposure was distributed uniformly in the whole coating, while T penetrated to the substrate by diffusion. The former is caused by T diffusion through open pores and/or along grain boundaries followed by adsorption on grain surfaces and dissolution in the grains. The main role of the W coating on T permeation is to reduce the incoming flux at the coating/substrate interface owing to pore diffusion in the coating and the effective area for T dissolution in the substrate.
AB - In order to understand the role of a plasma-sprayed tungsten (W) coating on tritium (T) permeation in a W-coated ferritic/martensitic steel (F82H), we have examined depth profiles of T in the coating and the substrate using the tritium imaging plate technique after T loading by a dc glow-discharged plasma at 453 and 573 K for 2 h. Tritium loaded by plasma exposure was distributed uniformly in the whole coating, while T penetrated to the substrate by diffusion. The former is caused by T diffusion through open pores and/or along grain boundaries followed by adsorption on grain surfaces and dissolution in the grains. The main role of the W coating on T permeation is to reduce the incoming flux at the coating/substrate interface owing to pore diffusion in the coating and the effective area for T dissolution in the substrate.
UR - http://www.scopus.com/inward/record.url?scp=84857591092&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84857591092&partnerID=8YFLogxK
U2 - 10.1088/0031-8949/2011/T145/014035
DO - 10.1088/0031-8949/2011/T145/014035
M3 - Conference article
AN - SCOPUS:84857591092
VL - T145
JO - Physica Scripta
JF - Physica Scripta
SN - 0031-8949
M1 - 014035
ER -